Inorganic Fiber Damage Evolution during Textile Processing

GE航空Bromont公司（GEAB）目前正在开发用于发动机的陶瓷基复合材料（cmc）。这些cmc由碳化硅（SiC）陶瓷纤维嵌入SiC基体材料制成。形成纱线的碳化硅陶瓷纤维具有很高的硬度和脆性。在所有的纱线处理过程中（例如，涂纱，绕线等），纱线都会受到中等程度的损坏。这种损害累积起来，对零件质量和成品率都有不利影响。GEAB和蒙特利尔理工学院最近合作开发了一种模型和测试方法，以了解纱线加工过程中纤维的损伤机制。作为该项目的延续，目前的Engage Plus提案的目标是开发并验证一种建模方法，以了解纱线加工过程中纤维损伤的演变。在Abacus中建立了一个参数化非线性有限元模型来表示**纱的处理情况。该模型现在将用于比较不同参数对摩擦耗散能和损伤的影响。一个小型的测试装置使用一个移动的纱线折磨装置运行在一个固定的纱线之间的负载传感器已经建成。这个装备现在将用于重现不同的伤害创造条件。测试条件将包括纱线对滑轮的移动速度，滑轮的转速，滑轮的直径和形状，以及滑轮的材料。通过这个项目，我们将开发有效的建模方法来理解纤维-纤维和纤维-表面摩擦的相互作用。GE Aviation Bromont将加大研发力度，将高性能复合材料应用于飞机发动机。

GE Aviation Bromont (GEAB) is currently developing ceramic matrix composites (CMCs) for engine**applications. These CMCs are made with silicon carbide (SiC) ceramic fiber embedded in a SiC matrix**material. The SiC ceramic fibers forming the yarns are highly stiff and brittle. During all yarn handling**operations (e.g., coating, spooling, etc.), yarns undergo a moderate level of damage. This damage accumulates**and has a detrimental effect on both part quality and yield. A recent collaboration between GEAB and**Polytechnique Montreal has resulted in the development of a modelling and testing approach to understand the**fiber damage mechanisms during yarn processing. As a continuation of this project, this present Engage Plus**proposal's objective is to develop and validate a modelling approach to understand the fiber damage evolution**during yarn processing. A parametric non-linear finite element model has been created in Abacus to represent**yarn handling situations. This model will now be used to compare different parameters' influence on friction**dissipated energy and damage. A small test rig using a moving yarn torture device running against a yarn fixed**between to load cells has been built. This rig will now be used to reproduce different damage creation**conditions. Test conditions will include yarn moving speed against the pulleys, rotation speed of the pulleys,**diameter and shape of the pulleys, and pulley material. With this project, we will develop validated modelling**approaches to understand fiber-fiber and fiber-surface friction interactions. GE Aviation Bromont will expand**its R&D efforts towards high performance composite applications in aircraft engines.